Finding the Fourth Proportional to 978,147, 1,467,351.72 and 417,312.72

Step by Step Solution

1. Step 1: Write the proportion equation
   978,147 : 1,467,351.72 = 417,312.72 : x
2. Step 2: Convert to fraction form
   978,147/1,467,351.72 = 417,312.72/x
3. Step 3: Cross multiply
   978,147x = 1,467,351.72 × 417,312.72
4. Step 4: Simplify right side
   978,147x = 612,344,537,469.88
5. Step 5: Solve for x
   x = 612,344,537,469.88/978,147
6. Step 6: Final answer
   x = 626,025.06